<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="btn-list">
          <div class="btn-wrapper">
            <div class="btn">{{currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="btn-list">
          <div class="btn-wrapper"
            v-for="item of hotCities"
            :key="item.id"
            @click="handleCityClick(item.name)">
            <div class="btn">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area"
        v-for="(item, key) of cities"
        :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"
            v-for="i of item"
            :key="i.id"
            @click="handleCityClick(i.name)">{{i.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapMutations, mapState } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hotCities: Array,
    cities: Object,
    letter: String
  },
  watch: {
    letter () {
      if (this.letter) {
        const ele = this.$refs[this.letter][0]
        this.scroll.scrollToElement(ele)
      }
    }
  },
  methods: {
    handleCityClick (city) {
      // this.$store.commit('changeCity', city)
      this.changeCity(city)
      this.$router.push({path: '/'})
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper)
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
@import '~styles/mixins.styl'
.border-topbottom
  &:before
    background-color #CCC
  &:after
    background-color #CCC
.border-bottom
  &:before
    background-color #CCC
.list
  position absolute
  top 1.58rem
  left 0
  right 0
  bottom 0
  overflow hidden
  .title
    line-height .54rem
    background #eee
    padding-left .2rem
    color #666
    font-size .26rem
  .btn-list
    overflow hidden
    padding .1rem .6rem .1rem .1rem
    .btn-wrapper
      float left
      width 33.33%
      .btn
        margin .1rem
        padding .1rem 0
        border-radius .06rem
        text-align center
        border .02rem solid #ccc
  .item-list
    .item
      line-height .76rem
      padding-left .2rem
      ellipsis()
</style>
